Clean with bidet, dry with tp. Also uses less tp

Technically a vagina has six holes (assuming this guy is talking about the whole genital when he says vagina):

The urethra, where pee comes out

The vagina, where sex

Two paraurethral glands (Skene’s glands), which secrete lubricating mucous during arousal and also produce female ejaculate when squirting (it’s not piss!) - these glands are analogous to prostatic glands in males

Two greater vestibular glands (Bartholin glands, which are paravaginal), which also secrete lubricating fluid.

Although I would advise against putting anything in those last four (they are visible to the naked eye but still very small). Also not sure how he counted 5.